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dbc641deb9
Currently 1 byte global object has a ridiculous 63 bytes redzone. This patch reduces the redzone size to be less than 32 if the size of global object is less than or equal to half of 32 (the minimal size of redzone). A 12 bytes object has a 20 bytes redzone, a 20 bytes object has a 44 bytes redzone. Reviewed By: MaskRay, #sanitizers, vitalybuka Differential Revision: https://reviews.llvm.org/D102469
46 lines
2.1 KiB
C++
46 lines
2.1 KiB
C++
// RUN: %clang_cc1 -triple x86_64-linux -fsanitize=address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,ASAN
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// RUN: %clang_cc1 -triple x86_64-linux -O2 -fsanitize=address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,ASAN
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// RUN: %clang_cc1 -triple x86_64-linux -fsanitize=kernel-address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,KASAN
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// RUN: %clang_cc1 -triple x86_64-linux -O2 -fsanitize=kernel-address -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,KASAN
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//
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// Not all platforms support aliases - test for Linux only.
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int global; // generate ctor for at least 1 global
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int aliased_global; // KASAN ignored
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extern int __attribute__((alias("aliased_global"))) __global_alias;
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// Recursive alias:
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int aliased_global_2; // KASAN ignored
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extern int __attribute__((alias("aliased_global_2"))) global_alias_2;
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extern int __attribute__((alias("global_alias_2"))) __global_alias_2_alias;
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// Potential indirect alias:
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struct input_device_id {
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unsigned long keybit[24];
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unsigned long driver_info;
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};
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struct input_device_id joydev_ids[] = { { {1}, 1234 } }; // KASAN ignored
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extern struct input_device_id __attribute__((alias("joydev_ids"))) __mod_joydev_ids_device_table;
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// ASAN: @aliased_global{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
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// ASAN: @aliased_global_2{{.*}} global { i32, [28 x i8] }{{.*}}, align 32
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// ASAN: @joydev_ids{{.*}} global { {{.*}}[56 x i8] zeroinitializer }, align 32
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// KASAN: @aliased_global{{.*}} global i32
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// KASAN: @aliased_global_2{{.*}} global i32
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// KASAN: @joydev_ids{{.*}} global [1 x {{.*}}i64 1234 }], align 16
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// Check the aliases exist:
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// CHECK: @__global_alias ={{.*}} alias
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// CHECK: @global_alias_2 ={{.*}} alias
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// CHECK: @__global_alias_2_alias ={{.*}} alias
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// CHECK: @__mod_joydev_ids_device_table ={{.*}} alias
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// CHECK-LABEL: define internal void @asan.module_ctor
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// ASAN: call void @__asan_register_globals({{.*}}, i{{32|64}} 4)
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// KASAN: call void @__asan_register_globals({{.*}}, i{{32|64}} 1)
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// CHECK-NEXT: ret void
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// CHECK-LABEL: define internal void @asan.module_dtor
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// CHECK-NEXT: call void @__asan_unregister_globals
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// CHECK-NEXT: ret void
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